November 4, 2026
A new CFxD update is now available.
Version 2.15.5 introduces new turbulence and radiation modeling capabilities, along with significant improvements to post-processing and overall usability. This release adds the SST-SAS turbulence model, the P1 radiation model, and y+ visualization for near-wall mesh assessment.
The update also extends transient post-processing capabilities, improves the graphical user interface, and includes updates to the manual and integrated help system.
What is new in CFxD 2.15.5
- All (IMP): GUI usability improved.
- Setup (NEW): SST-SAS turbulence model implemented.
- Setup (NEW): P1 radiation model implemented.
- Result (NEW): Wall y+ visualization added.
- Result (NEW): Transient post-processing capabilities extended.
- Manual (IMP): Documentation updated.
- Help (IMP): Integrated help system updated.
Major new capabilities
SST-SAS Turbulence Model
The new Shear Stress Transport – Scale-Adaptive Simulation (SST-SAS) model extends CFxD turbulence modeling capabilities. It allows the simulation to resolve larger unsteady turbulent structures when the flow conditions and mesh resolution permit, providing an alternative to conventional RANS models for complex transient flows.
P1 Radiation Model
The implementation of the P1 radiation model expands CFxD thermal simulation capabilities by accounting for radiative heat transfer in participating media. This model is particularly useful for applications involving radiation absorption and emission within fluid regions.
Wall y+ Visualization
The new y+ visualization feature allows users to evaluate near-wall mesh resolution directly in the Results section. This helps assess the suitability of the boundary-layer mesh for the selected turbulence model and identify regions requiring additional mesh refinement.
Extended Transient Post-Processing
Transient post-processing capabilities have been extended, providing greater flexibility for analyzing time-dependent simulation results and examining the evolution of flow variables.
GUI and Documentation Improvements
Further interface improvements make the CFxD workflow more convenient and intuitive. The manual and integrated help system have also been updated to reflect the latest features.